I just took all of the properties that he tinkers with to finesse his animation and connected them to expression controls.
I'm using it on Duik controllers in order to add "Idle" animation when the "enable" checkbox is on and be able to keyframe animate when it's off. The problem is AE slows down to a crawl and it's really unusable.
I can load the rig and the first time I move a controller it works quickly and well. The next time I try to move a controller I have to select the controller in the layer stack and then click over to the composition panel and wait for the blue "activated" outline appear around that panel. Then I can drag the controller, but it only works after waiting for some kind of calculation to get done over the course of 5 or so seconds.
What am I doing wrong? I'm willing to share the project if someone is able to help troubleshoot.